Caliper-rule



II. I. OSTIJIEK.

CALIPER RULE.

APPLICATION FILED IIIIAII. 29, I9I9.

Patented June 15, 1920.

UNITED STATFLS aerien.

CAMPER-RULE.

Specification of Letters Patent. Patented une 15, 1920.

Application led March 29, 1919. Serial No. 286,096.

To all whom t may concern:

Be it-known that I, HERMAN J. OsTDIEK, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have'invented certain new and useful Improvements in Caliper- Rules; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its object, to provide a combined caliper rule and square of sim-- ple construction and small cost, and to such ends generally stated, the invention consists of the novel construction and combinations of parts, hereinafter described and defined in the claims.

The invention is illustrated in the accompanying drawings, wherein like characters indicate like parts throughout the several views. Referring to the drawings Figure 1 is a plan view showing the elements of the tool, extended for use as a graduated scale or rule;

Fig. 2 shows the device just to be used as a square;

Fig. 3 shows the device folded;

Fig. 4 is an enlarged section taken on the line 4-.4 of Fig. 3;

Fig. 5 is a plan view of the central or main section of the device; and

Fig. 6 is a plan view of the sliding section of the rule.

The device is made up of three elements, to wit, the main body section 7, a pivoted section 8, and a sliding section 9, all of which parts may be made from thin sheet metal. The main or body section 7 is provided with an extended portion bent to form a rectangular fold 10, to freely slide. At its outer end, the sliding section 9 is formed with a caliper head 11 that projects therefrom at a right angle, so that the diameter or width of an object may be calipered or measured between the ed e 11a of said head and the parallel end sur ace 7 n of the body section 7.

To prevent the sliding section 9 from being brought out of the guide fold 10, the former is provided with a raised boss 12 that works freely in a channel formed by an outpressed bead 13, in the offset side of the guide fold 10. This bead 13 and the channel therein, terminate short of the ends of the body section 7, but are long enough to permit the sliding section v9 to be moved to and from the eXtreme positions shown in Figs. 1 and 3. l

The section 8 is pivoted to the main flange of the body section 7 at 14, and is formed with a laterally pressed boss 15 that will engage frictionallyl and under spring-action, with any one of three indentations-15a, 15b and 15, formed in the main 'plate of the body section 7 eccentric to the ivot 14. When pivoted section 8 is lturne into its extended position shown in Fig. 1, Iboss 15 will engage indentation 15a and hold the same against accidental movement; when said pivoted section 8 is turned into its vertical position shown in Fig. 2, so as to form a square, said boss 15 will engage indentation 15b; and When'pivoted section 8 is turned'to its folded position `shown.in Fig. 3, boss15 will engage indentation 15C. Thus the pivoted section, by a little force applied thereto, may be moved from the one position to the other, but will be held against accidental movements in any one of the three above noted positions, it of course being understood, that the rivet which forms the pivot 14, will be suiciently tight to cause the engagement of they boss with.

the indentations under a spring-action. All three of the sections- 7, 8 and 9, are graduated in lineal dimensions, usually in inches and fractions thereof, but in some instances, the metric system may be used in these graduations; also it will be understood that in practice, these said elements will be graduated in smaller fractions of the lineal dimension, than is shown in the drawings.

In assembling the parts of the tool it is only necessary to connect the sections 7 and 8 by a single rivet 14, and then to slip the boss-equipped end of the sliding section into the folded guide 10, so that its boss 12 enters the channel of bead 13, and then to press the fold 10 down tightly against the same, thereby interlocking the parts with the section 9, free for sliding movements and incapable of accidental separation from the main body section.

The pivoted section or blade 8 is formed with a longitudinal row of small perforations 16, so that by inserting the point of a pencil through one of these perforations, then moving the blade or section 8 on its pivot 14, circles or segments of circles may be marked.

The manner of folding the main body section 7 to afford the guide for the sliding.

section 9, makes the tool of small cost, and as all the partsv may be stampedv to shape from sheet metal7 the entire tool may be made at small cost. The tool is, therefore, especially adapted to be made at such low cost that it may be sold, for example, at 10 stores, or maybe given away` for advertising purposes. However, the tool may be made accurately, and as a high grade tool'.

What I claim is v1. In a tool 'of the kind described, the combination with a main body section formed from afl'at piece of metal and bent to form a rectangular guide, of a sliding section mounted' iny said foldedV guide and provided atits extended end with an offset caliper head-,cooperating with the'adjac'ent end of the body section,-.one side of said guidefold having a longitudinally extended outp'ressed bead, and the said sliding section having a boss working in said bead, but cooperating therewith to hold. said sliding section against accidental separation from said body section;

2.`In"a tool of the kind described, the combination with a main body section formed from a flat piece of metal and bent to form a rectangular guide, of a sliding section mounted in said folded guide and provided at its extended end with an offset caliper head cooperating with the adjacent end of the body section, and a third section pivoted to that end of the body section that is opposite to Vthe'end thereof that coperates with the head of said sliding member,

the said pivoted section being adapted to be.

folded directly against thel offset guide fold of said `body* member. Y

3. In a tool of the kind described, the

combination with a main'body section, of a sliding sectiomslidable in said body section and provided as extended'in withf a caliper head at its outer rim, and a third sect-ion pivoted to that endofthe body section that 

